If this is already been asked, I am sorry, but I was not able to find it...

I am looking into buy a fixed for a friend of a friend, and my question is... it has 27" tires, is it difficult to find tubes and tires for it? The owner says that he has no problems, but he lives in a big city, while I live is a college town (one bike store) and they do not stock any (at less from what I can tell)
Thanks and I hope to join the fixed community here shortly